Fuel checker device



FIG. 1 is a diagrammatic left side elevational view showing my new design for a fuel checker device, the right side being a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top elevational view thereof; and,

FIG. 5 is a bottom elevational view thereof. 

The ornamental design for: fuel checker device, as shown and described. 